Carburetor-adjusting mechanism



April 21, 1925. 1,534,680

G. P. BUMP CARBURETOR ADJUSTING MECHANI SM FiledJan. 24. 1924 2Sheets-Sheet l April 21,19 5; v 1,534,680

a. P. BUMP CARBURITOR ADJUSTING IECHANISM Filpd JUL 1924 2 Sheets-Sheet2 Patented Apr. 21, 1925.

UNITED STATES GEORGE I. Borne, or LA onossn, WISCONSIN.

CARBURETOIt-ADJUSTING MECHANISM.

Applieation filed January 24-, 1924. Serial No. 688,237.

To all whom it may concern.

Be it known that I, GEORGE P. BUMP, a citizen of the United States,residing at La Crosse, in the county of La Crosse and State ofWisconsin, have invented certainnew and useful Improvements inCarburetor-Adjusting Mechanisms, of which the following is aspecification.

This invention relates to means for adjusting the carburetor of anautomobile engine and has for its object the provision of mechanismwhich may be easily operated by the chauffeur from the seat of thevehicle and which will facilitate accurate adjustment of the carburetoraccording to weather conditions or the temperature of the engine so thatthe engine may be operated with a maximum quantity of air and a minimumvolume of fuel under any given circumstances. The invention also has forits object the provision of means whereby the opening movement of thecarburetor valve will be limited, and also has for its object theprovision of means whereby the choker valve of the carburetor will beautomatically closed when starting the engine in cold weather.Theinvention also seeks to provide a carburetor-controlling mechanismwhich may be'easily adjusted to the space available upon any type of carwithout requiring any substantial reconstruction of any of the parts.The invention is illustrated in the accompanying drawings and resides incertain novel features which will be hereinafter first fully describedand then more particularly pointed out in the appended claims.

In the drawings:

Figure l is a side elevation of my improved carburetor-controllingmechanism in its--working position, parts of an automobile being shownin section so that the arrangement and operation of the mechanism may bemore readily comprehended;

Fig. 2 is an elevation of the dial and operating knob which are mountedupon the instrument board of the vehicle;

Fig. 3 is a central longitudinal section of the dial and operating knobwith the parts immediately adjacent the same;

Fig. 4 is a vertical longitudinal section of aportion of the gearingforming a part of the apparatus together with the bracket by which thegearing is supported, and c Fig. 5 is a detail section on the line 55 ofF ig. 4,, the line %4 in this figure indicating the plane and viewpointof Fig. 4.

In the drawings, the reference numeral 1 indicates the instrument boardof an automobile, 2 the dash and 3 a part of the cowl. In carrying outmy invention, I secure upon the instrument board 1 adial 4 havingcertain legends displayed thereon in a circular series and having anopening therethrough concentric with the said circular series oflegends. Fitted in the said central opening of the dial and extendingthrough an alined opening in the instrument board is a bearing sleeve orbarrel 5 through which a shaft member 6 is rotatably fitted. The rearend of this shaft is reduced, as shown at 7, and the operating knob 8 issecured upon the said reduced end, a pointer 9 being associated with theknoband projecting radially therefrom and from the shaft member to playover the leg ends upon the dial. Adjacent its lowest edge, a stop pinorstud 10 projects from the dial into the path of the pointer so thatthe movement of the dial is limited to one complete rotation, less thethickness of the said pin or stud. The elements which connect the shaftsection 6 with the carburetor valve 11 include gears 12 and 13 having apredetermined fixed ratio so that the carburetor valve can only be givena predetermined number of turns in its opening movement, and flooding ofthe carburetor through excessive opening of the valve will be therebyavoided. In the particular embodiment of the invention illustrated inthe accompanying drawings, the diameter of the-gear 12 is twice thediameter of the gear 13 so that the carburetor valve will be given twocomplete turns with one complete turn of the knob 8, but the gears mayhave any other ratio which experience and any peculiar circumstances orconditions may suggest or determine.-

Seoured to the forward end of the shaft memberfi is a yoke 14constituting one member of a universal joint 15 whereby a shaft section16 is operatively connected with the shaft section or member 6. Theshaft member 16 has a telescopic engagement with a shaft section 17, andthese sections 16 and 17 are secured in any desired axial relation by aclamping collar 18 fitted about the end of the outer or tubular member17 and carrying a set screw 19 which is engageable stout wire so thatits ends may be easily bent to engage the parts'with which theyrespectively operate and the necessity for extensibility of the'linkwill be thereby overcome.

The device is very simple in its construction, compact in arrangementand may be readily applied to any vehicle. By its use, the chauffeur mayadjust the carburetor without being required to leave his seat or reachunder the instrument board or otherwise be subjected to anyinconvenience or discomfort. The legends upon the dial show in easilyunderstood symbols just where to place the indicator to suit variousconditions in running and starting the engine and the choker valve isautomatically closed when the knob is given a complete turn so that theproper mixture for starting the engine in very cold weather will be fedto the engine Without requiring excessive attention on. the part of theoperator and without leaving any uncertainty as to the nature of themixture.

Having thus described the invention, I claim:

1. In a carburetor-adjusting mechanism, the combination of a knob,operative con nections between the knob and the valve of the carburetorincluding shaft sections and 'intermeshing gears on the adjacent ends ofthe shaft sections, a lever loosely mounted upon one shaft sectionadjacent the gear, an operative connection between said lever and thechoker valve of the carburetor, means for supporting said lever innormal position, and means carried by one of the gears to engage the leter after partial rotation of. the gear and raise the lever throughfurther rotation of the gear.

2. In a carburetor-adjusting mechanism, the combination of an operatingknob, operative connections between said knob and the valve of thecarburetor including shaft sections and intermeshing gears on the adjacent ends of said shaft sections, a lever loosely mounted on one oisaid shaft sections adjacent the gear thereon, a connection between saidlever and the choker valve of the carburetor, a fixed pin disposed belowthe lever and normally supporting the same, and a pin on the adjacentgear normally disposed above the lever and adapted upon rotation of thegear to engage the lower edge of the lever and lift the lever.

In testimony whereof I affix my signature.

enones P. BUMP. a s.]

